Sole for shoes including transpiration side valves formed by moulding

Abstract

A sole for shoe of elastic material is provided with valves placed at its sides for discharging inner air, each said valve consisting of a through channel ( 4 ) formed in the thickness of the sole and not involving the tread of the sole, which channel ( 4 ) connects the interior of the shoe to the outside and is closed by a perforated diaphragm or membrane ( 2 ) of elastic material provided with a convexity directed to the outside and forming a check valve. Advantageously, said valves are made in one piece of elastic material with the sole during the same moulding step, the membrane being provided with microholes in a later step.

1 . A sole for shoe provided with valves placed at its sides for discharging inner air characterized in that each said valve consists of a through channel ( 4 ) formed in the thickness of the sole and not involving the tread of the sole, which channel ( 4 ) connects the interior of the shoe to the outside and is closed by a perforated diaphragm or membrane ( 2 ) of elastic material provided with a convexity directed to the outside and forming a check valve.  
     
     
         2 . The sole according to  claim 1 , characterized in that a peripheral channel ( 21 ) is provided conveying to one or more valves the air blown during walking by a plurality of protrusion or igloos ( 15 ), on which the foot of the walker rests with the interposition of a perforated transpiration sole ( 16 ), said igloos ( 15 ) being hollow and open to the top ( 14 ) to the interior of the shoe.  
     
     
         3 . The sole according to  claim 1 , characterized in that said channels and said membranes are of elastic material and are made in one piece with the sole during the same moulding step.  
     
     
         4 . The sole according to  claim 1 , characterized in that a plurality of microholes is formed in each diaphragm or membrane ( 2 ) after the moulding step.  
     
     
         5 . The sole according to  claim 1 , characterized in that there is provided: 
 a generally vertical side ( 10 ) extending in height from foot bearing ground above the tread ( 18 ) and to which the upper of the shoe is partially secured;    a plurality of dome-shaped chambers, igloos, protrusions or the like ( 15 ), on which the foot rests with the interposition of a perforated transpiration sole ( 16 ), each chamber or igloo being provided with a hollow ( 19 ) and at the upper side with a through hole ( 14 ) allowing the aeration of the shoe whenever the igloos are pressed during walking;    a small channel ( 21 ) which follows the periphery of the area containing the igloos and conveys the air blown from the igloos during walking;    a plurality of check valves embodied in the sole, each of them consisting of a thin membrane ( 2 ) which is provided with a microhole ( 2   a ) and closes a conduit ( 4 ) passing through the side of the sole and connecting the interior of the shoe to the outside through a side opening ( 3 ).    
     
     
         6 . The sole according to  claim 5 , wherein the protrusions ( 15 ) have an elliptical plan.  
     
     
         7 . The sole according to  claim 5 , wherein the protrusions have a plan with different shape and size and are distributed in irregular manner.  
     
     
         8 . The sole according to  claim 5 , characterized in that it is made of elastic material such as rubber or the like.  
     
     
         9 . The sole according to  claim 5 , characterized in that the side ( 10 ) is made of polyurethane and tread ( 18 ), protrusion ( 15 ) and side valves are of rubber.  
     
     
         10 . The sole according to  claim 5 , wherein a generally horizontal resting surface ( 17 ) which can be used to secure the upper is disposed between side ( 10 ) and small channel ( 21 ).  
     
     
         11 . The sole according to  claim 9 , wherein in order to prevent the polyurethane from entering the small channel ( 21 ) and the area of the protrusions ( 15 ), a vertical small wall ( 23 ) following the small channel ( 21 ) and having a height equal to the protrusions ( 15 ) is provided integral with the tread ( 18 ).  
     
     
         12 . The sole for shoe according to  claim 5 , wherein the aeration chambers formed by the protrusions or igloos ( 15 ) are replaced by a layer ( 27 ) of elastic transpiration material with a low specific gravity to reduce the weight of the sole and/or its size.  
     
     
         13 . The sole for shoe according to  claim 12 , characterized in that the layer ( 27 ) can be provided with a plurality of channels or grooves ( 28 ) to help the air circulation.